What lifting lasers are effective for a sagging double chin?

My skin is sagging, making my double chin look more prominent. Is there any way to fix this? It looks even worse because I've gained a lot of weight recently. I thought gaining weight would make my skin look firmer, but perhaps because my skin is naturally thin and lacks elasticity, it just increased the volume of my double chin. The sagging skin still looks like it's dripping down my chin. Since I tend to accumulate fat only around my jaw when I gain weight, my lower face looks more pronounced, blunt, and saggy. Is there a way to lift just the jawline without causing hollowing in my cheeks? I understand there are various types of lifting lasers; please recommend a procedure that is effective for a double chin like mine, caused by sagging skin due to some fat and lack of elasticity.